Deploy the powerdns-admin helm chart on Rancher

Question

Pulumi · Accepted Answer

Deploying a Helm chart on a Rancher-managed Kubernetes cluster can be an intuitive process with Pulumi. To accomplish this, we'll proceed with the following steps:

1. Set up Rancher with Pulumi, using the Rancher 2 provider. This assumes that you've already configured a Rancher server and have access credentials for it.
2. Deploy the PowerDNS Admin Helm chart to a Kubernetes cluster managed by Rancher.

We will use Pulumi's Rancher 2 provider to interact with Rancher. If there are specific configurations, like version constraints or custom values for the PowerDNS Admin Helm chart, those can be provided in the chart deployment.

Here's a Pulumi TypeScript program that deploys a Helm chart on a Rancher-managed Kubernetes cluster:

```typescript
import * as pulumi from '@pulumi/pulumi';
import * as rancher2 from '@pulumi/rancher2';
import * as k8s from '@pulumi/kubernetes';

// Initialize a Rancher2 provider instance using the credentials to connect to your Rancher server.
const rancherProvider = new rancher2.Provider('my-rancher', {
    apiUrl: 'https://rancher.my-company.com/v3',
    accessKey: 'RANCHER_ACCESS_KEY',
    secretKey: 'RANCHER_SECRET_KEY',
});

// Reference an existing cluster managed by Rancher to deploy your Helm chart.
// Replace 'cluster-id' with the appropriate ID from your Rancher setup.
const cluster = rancher2.getCluster({
    clusterId: 'cluster-id',
}, { provider: rancherProvider });

// Create a Kubernetes provider instance that targets the Rancher-managed cluster.
const k8sProvider = new k8s.Provider('k8s-provider', {
    kubeconfig: cluster.kubeConfig,
}, { dependsOn: [rancherProvider] });

// Deploy the PowerDNS Admin Helm chart onto the specified cluster.
const powerdnsAdminChart = new k8s.helm.v3.Chart('powerdns-admin', {
    // Specify the chart repository and chart name.
    chart: 'powerdns-admin',
    version: 'chart-version', // Specify the chart version.
    fetchOpts:{
        repo: 'https://helm-repository-where-chart-is-hosted.com/', // Replace with the actual Helm repository URL.
    },
    // Specify any custom values you want for this deployment.
    // This is equivalent to using the --set flag with helm CLI.
    values: {
        serviceType: 'ClusterIP', // Example, should be replaced with actual custom values.
    },
}, { provider: k8sProvider }); // Specify that this Helm chart should be deployed using the Rancher Kubernetes provider.
```

Before running this program, replace `https://rancher.my-company.com/v3`, `RANCHER_ACCESS_KEY`, `RANCHER_SECRET_KEY`, `cluster-id`, `chart-version`, and `https://helm-repository-where-chart-is-hosted.com/` with your specific details. These will include the location of your Rancher server, your access and secret keys, the ID of the cluster you're deploying to, the version of the chart, and the URL of the Helm repository where the PowerDNS Admin chart is located.

The program initializes a Pulumi Rancher 2 provider to interact with the Rancher server. It retrieves the cluster configuration, creates a Kubernetes provider scoped to the Rancher cluster, and then deploys the PowerDNS Admin Helm chart to that cluster.

To apply this Pulumi configuration, first ensure that you have Pulumi installed and configured for use with Rancher. Then navigate to the directory containing your `index.ts` Pulumi program file and run the following commands:

```bash
pulumi stack init dev  # Initializes a new Pulumi stack called 'dev'
pulumi up              # Deploys the resources as specified in your program
```

This will start Pulumi's deployment process, which displays a preview of the resources to be created and prompts you for confirmation before proceeding with the actual deployment. After the deployment, you should see your PowerDNS Admin service running in your Rancher-managed Kubernetes cluster.